Dictionary

quadrennial

adjective qua·dren·ni·al \kwä-ˈdre-nē-əl\

Definition of QUADRENNIAL

1
:  consisting of or lasting for four years
2
:  occurring or being done every four years
quadrennial noun
qua·dren·ni·al·ly \-nē-ə-lē\ adverb

First Known Use of QUADRENNIAL

circa 1656

Other Number-Related Terms

jubilee, myriad, quarantine, score, twain

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